Boiler-feeding apparatus.



Patented July 25, I899.

J. SCOTT.

BOILER FEEDING APPARATUS.

(Application filed Oct 22, 1898.)

/N ENTOH ATTORNEYS.

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. WITNESSES.

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UNITED STATES PATENT OFFICE.

JAMEs sco'r'r, or I-IAKODADI, JAPAN.

BOILER-FEEDING A PARATUS.

srEoiFIcA'rro'N forming part or Letters Patent No. 629,615, dated July 25,1899.

Application filed October 22,1898. Serial No. 694,281, (No model.)

To all whom it may concern:

Be it known that I, J AMEs SCOTT, of Hakodadi, Japan, have invented a new and Improved Boiler-Feeding Apparatus, of which the following is a full, clear, and exact de- This invention relates to an apparatus for feeding boilers,and it is broadly characterized by two receivers in which the steam-pressure of the boiler acts alternately, so as to force water from the receivers past check-valves and into the boiler. v

This specification-is the disclosure of one form of my invention, while the claims define the actual scope of the invention.

Reference is to be had to the accompanying drawings, forming a part of this specification,

in which similar characters of reference indicate corresponding parts in both the figures.

Figure 1 is a sectional elevation of the apparatus, and Fig. 2 is an elevation of the seatof the valve controlling the flow of the steam.

.On a base structure 3 are mounted two receivers 4, each of which is provided with a gage 5, by which to indicate the height of water therein. In each receiver 4 is a float 6, to the lower side of w iich is centrally connected a guide-rod 7 and to the upper side of which is centrally connected a similar rod 8.

The guide-rods 7 respectively pass throughguide-blocks 9, held by spiders 10 in the receivers 4, which blocks limit the downward movement of the floats. The rods 7 respec-' tively, pass through packing glands 11 in the base 3 and into pipe-sections 12, which are one for each receiver 4 and which are connected with each other by a pipe 14, which serves to collect and retain leakage from the glands. The floats '6 act alternately, so that the rod 7 of one pipe 12 is withdrawn as the rod 7 of the other pipe is projected into said other pipe. This causes an alternate projection and retraction of the rods 7 in the pipes 12,

ceiver 4, and each rod 8 is provided above the packing-gland thereof with a pivoted dog 16, coacting with a hook 17, formed on the upright arm of an elbow-lever 18. The two elbow-levers 18 are respectively fulcrumed on the tops of the receivers 4 and have their horizontal arms connected with retractile spiral springs 19, such springs being in turn held by screws 20, adjustable-in supports 21, mounted on the receivers 4. The upward movement of the horizontal arms of the le-' vers 18, under the influence of the springs 19, is limited by pins 22, carried on the supports 21. Mounted on the top of each receiver 4 is a rigid arm 23, carrying an antifrictionroller 24, which rollers respectively bear against blocks 25 on the rods 8, to which blocks the dogs 16 are pivoted, the arms 23 and rollers 24 serving to brace the rods 8 when the dogs '16 are engaged with the hooks 17.

The water rising in the receivers 4, as shown with relation to the right-hand receiver in Fig. 1, lifts the float 6, and as the buoyant action of the water becomes sufficiently great the stress of the spring 19--is overcome and the hook 17 of the lever 18 is thrown back, so

as to release the dog 16 and permitthe float to rise, carrying with it the rods 7 and 8. Each rod 8 is pivotedtoa beam-lever 26, such levers being in turn fulcru med on standards 27, rising from a frame-plate 28, extending between the tops of the receivers 4. The inner end of each lever 26 is slotted to receive a pin 29, attached to an oscillating wheel 30, mounted on a standard 31,carried by the frame-plate 28.

By these means thelifting of one float 6 causes the other float to be depressed in unison'with the lifting of the first float, since the two rods 8 are connected as shown. Therefore when one float is raised the-dog 16thereof is disconnected from the hook 17 while the dog 16 of the other float is moved downward, so as to become again connected with the hook 17 the said other float being meanwhile moved downward to the limit of its downward stroke and in position to be subsequently raised by the action of water coming into the receiver 4.

The receivers 4 are fed with water under pressure from a pipe 32, which has branches 33 respectively leading to the receivers and each commanded by a check-valve 34, preventing the return of the water through the branches 33. The water is forced from the receivers 4 by means of steam-pressure from the boiler, which steam is led froma pipe 35 to a valve-chest 36, in which is formed a passage 37, with a port 38 at each end, such a stasis ports respectively leading to the ends of the cylindrical valveseat 39, situate within the valve-chest and shownin detail in Fig. 2. The valve-seat 39has two series of foraminations 40 and 41, each series forming ports respectively in communication with steampipes 42 and 43, which lead, respectively, to the tops of thereceivers 4. The valve-seat 39 has a third series of perforations 44, (see Fig. 2,) located between the series 40 and 41 and which communicate with an exhaustpipe 45, as shown in Fig. 1. A cylindrical slide-valve 46 is mounted in the valve-seat 39 and is movable to connect either one of the pipes [42 and 43 with the passage 37 and at the same time connect the other of said pipes 42 and 43 with the exhaust-ports 44. The ports 38 lead into theends of the seat 39, as shown, so that steam is always under pressure in each end of the seat 39. The valve 46 is connected with a stem 47, that passes through the top of the chest 36 and is attached to a link 48, in turn connected with the wheel 30. Therefore as the floats 6 move alternately up and down the valve 46 is shifted in unison therewith, so as to causethe steam to flow alternately through the pipes 42 and 43 and so as to permit the receivers 4 to alternately exhaust themselves by way of theports 44 and pipe 45. According to the adjustment shown in Fig. 1 the steam from the passage 37 passes through the lower port 38 into the seat 39 and thence through the ports 41 into the pipe 43 and to the right-hand receiver 4. Meanwhile the left-hand receiver 4- is free to exhaust the air it contains through the pipe 42 into the seat 39 by way of the ports 40 and out thereof by way of the ports 44 and pipe 45. During this exhaustion of the left-hand receiver 4 the water is entering said receiver by the branch 33 of the pipe 32 and past the check-valve 34 thereof, which check-valve prevents the return of the water. The water from the receivers 4 is led through the pipes 49, passing, respectively, from the receivers into a chest 50, seated on the base 3 and having two cavities or chambers 51, containing check-valves 52. The chambers 51 communicate with the pipes 49, and the upper portion of each chamber 51 is formed with an outlet-orifice 53, which orifices lead to the boiler and carry the feed-water thereto. The stems of the valves 52 pass up into a chamber 54 in the top of the chest 50, and their upward movement is limited by hand-screws 55. Leakage through the packing-glands that surround the stems of the valves 52 passes into the chamber 54, from which it may be withdrawn by the pipe 56, leading from the chamber 54 to the pipe 32. The water in the pipe 32 being under pressure in the direction shown by the arrow in Fig. 1 tends continually to enter the receivers 4. Assuming that the valve in the chest 36 is adjusted as shown in Fig. 1, the steam from the pipe 32 will force the water from the right-hand receiver 4 into the pipe 49 thereof, past the corresponding valve 52, and out of the orifice 53. The action of the steam of course overcomes the pressure of the water in the pipe 32; but the check-valve 34 prevents the 'water from being forced back into the pipe As the water passes from the right-hand receiver the float 6 thereof drops, causing the dog 16 thereof to be again engaged with the corresponding book 17 and also by the rod 8, lever 26, wheel 30, link 48, andstem 47, shifting the valve 46. Meanwhile the water will have been forced into the left-hand receiver 4, causing the float 6 thereof to be lifted simultaneously with the dropping of the float 6 in the right-hand receiver 4. As the float of the left-hand receiver is-lifted the dog 16 is disengaged from the hook 17, and the steam then passes through the pipe 42 to perform the same operations previously described. It will thus be seen that the devices of the two receivers act in unison to alternately force the water out of the receivers and through the orifices 53.

The invention is adapted particularly for use on boilers in which there is a strong back pressure on the steam and in which it would be difticult to feed water by the ordinary ap pliances.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination of a receiver, a float mounted in the receiver, a spring-pressed 1e ver fulcrumed on the receiver and having a hook, a rod attached to the float, a dog mount ed on the rod and coacting with the hook, and an antifriction-roller rigidly sustained on the receiver and adapted to brace the rod against the spring-pressed lever.

2. The combination of a valve chest having two chambers therein, the chambers having each an inlet and an outlet orifice, a check valve mounted in each chamber to command said orifices, stems attached to the checkvalves, the vaIve-chest having a third and u p per chamber into which the stems are passed, such third chamber having a leakage-outlet, and hand-screws working in said third cham= her to limit the movement of the valve-stem.

3. In a boiler-feeding apparatus, the combination of two receivers, a float working in each receiver, gearing connecting the floats to move in unison, a steam-chest, means for placing the steam-chest in communication with each receiver, a slide-valve working in the steam-chest and causing the steam to flow alternately to the receivers, means for driving the slide-valve in unison with the movements of the floats, a valve-chest having three chambers therein, two of the chambers respectively com municating with the receivers to take the water therefrom, and a valve in each of said two chambers of the valve-chest, such valves respectively commanding the flow of water from the receivers and having their stems extended into the third chamber of the valve-chest, and means in the said chambers Its for engaging the valve stems to limit the movements of the valves.

4. In a boiler-feeding apparatus, the combination of two receivers, a float mounted in each receiver, a rod in connection with each float, a lever to which each rod is connected, an oscillating wheel having connection with the levers to transport movement from the one to the other, means for feeding steam to the receivers, a valve commanding said means and connected with the oscillating wheel to be driven thereby, and water inlet and outlet devices for the receivers.

5. In a boiler-feeding apparatus, the combination of two receivers, a float movable in each receiver, a rod in connection with each fioat, means connecting the two rods to move in unison, a dog carried by each rod, a springpressed lever coacting with each dog to momentarily hold the floats, a valve controlling thesteam-inlet to the receivers, such valve being in connection with the rods and the floats, and water inlet and outlet devices for the receivers.

JAMES SCOTT. Witnesses:

JOHN F. GORREY, JOHN MCLEAN. 

